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c++: Ensure DECL_CONTEXT is set for temporary vars [PR114005]

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Modules streaming requires DECL_CONTEXT to be set for anything streamed.
This patch ensures that 'create_temporary_var' does set a DECL_CONTEXT
for these variables (such as the backing storage for initializer_lists)
even if not inside a function declaration.

	PR c++/114005

gcc/cp/ChangeLog:

	* init.cc (create_temporary_var): Use current_scope instead of
	current_function_decl.

gcc/testsuite/ChangeLog:

	* g++.dg/modules/pr114005_a.C: New test.
	* g++.dg/modules/pr114005_b.C: New test.

Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>
This commit is contained in:
Nathaniel Shead 2024-02-29 22:49:13 +11:00
parent b7b387e120
commit 2823b4d96d
3 changed files with 16 additions and 1 deletions
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2
gcc/cp/init.cc
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@ -4258,7 +4258,7 @@ create_temporary_var (tree type)
TREE_USED (decl) = 1;
DECL_ARTIFICIAL (decl) = 1;
DECL_IGNORED_P (decl) = 1;
DECL_CONTEXT (decl) = current_function_decl;
DECL_CONTEXT (decl) = current_scope ();
return decl;
}

8
gcc/testsuite/g++.dg/modules/pr114005_a.C Normal file
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@ -0,0 +1,8 @@
// { dg-additional-options "-fmodules-ts" }
// { dg-module-cmi M }
module;
#include <initializer_list>
export module M;
export constexpr std::initializer_list<int> foo{ 1, 2, 3 };

7
gcc/testsuite/g++.dg/modules/pr114005_b.C Normal file
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@ -0,0 +1,7 @@
// { dg-additional-options "-fmodules-ts" }
import M;
int main() {
return foo.size();
}